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Finding the Fourth Proportional to 21,511.76, 32,262.77 and 8,179.99

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Solution

The fourth proportional to 21,511.76, 32,262.77 and 8,179.99 is: 12,268.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.76 : 32,262.77 = 8,179.99 : x
  2. Step 2: Convert to fraction form
    21,511.76/32,262.77 = 8,179.99/x
  3. Step 3: Cross multiply
    21,511.76x = 32,262.77 × 8,179.99
  4. Step 4: Simplify right side
    21,511.76x = 263,909,075.77
  5. Step 5: Solve for x
    x = 263,909,075.77/21,511.76
  6. Step 6: Final answer
    x = 12,268.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.